Hi, i have lymphedema. i am having difficulty with climbing up and down the stairs, due to the lymphedema, which is impacted my knees?

Could it be osteoarthritis or the weight of your legs from lymphedema that's affecting your knees? I recommend consulting a vascular surgeon for evaluation and advice.

A lymphedema clinic in the area will be best, in order to be able to work with a lymphedema therapist as well as a general physical therapist in increasing your strength in the lower body. Your primary care doc will be best to coordinate based on local resources.